111222013231 has 4 divisors (see below), whose sum is σ = 127110872272. Its totient is φ = 95333154192.

The previous prime is 111222013207. The next prime is 111222013237. The reversal of 111222013231 is 132310222111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111222013231 - 2²⁷ = 111087795503 is a prime.

It is a super-2 number, since 2×111222013231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111222013199 and 111222013208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222013237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7944429510 + ... + 7944429523.

It is an arithmetic number, because the mean of its divisors is an integer number (31777718068).

Almost surely, 2^111222013231 is an apocalyptic number.

111222013231 is a deficient number, since it is larger than the sum of its proper divisors (15888859041).

111222013231 is an equidigital number, since it uses as much as digits as its factorization.

111222013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15888859040.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 111222013231 its reverse (132310222111), we get a palindrome (243532235342).

The spelling of 111222013231 in words is "one hundred eleven billion, two hundred twenty-two million, thirteen thousand, two hundred thirty-one".